Retook PPP last Sunday and just found out that I passed! I couldn't understand why I failed the vignette on the first try so I really paid attention this time, to the point of almost running out of time.
Biggest tip is to practice, practice, practice. Especially taking notes. Read Ben Rudgers tips and the vimeo. Also see previous discussions about how angles are measured. I really suspect that is what got me the first time.